CN106206239A - A kind of efficient combined-type atmospheric pressure ionization source - Google Patents
A kind of efficient combined-type atmospheric pressure ionization source Download PDFInfo
- Publication number
- CN106206239A CN106206239A CN201610855957.3A CN201610855957A CN106206239A CN 106206239 A CN106206239 A CN 106206239A CN 201610855957 A CN201610855957 A CN 201610855957A CN 106206239 A CN106206239 A CN 106206239A
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- Prior art keywords
- injection port
- vuv lamp
- ionization source
- ground electrode
- quartz glass
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/10—Ion sources; Ion guns
- H01J49/14—Ion sources; Ion guns using particle bombardment, e.g. ionisation chambers
- H01J49/145—Ion sources; Ion guns using particle bombardment, e.g. ionisation chambers using chemical ionisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/10—Ion sources; Ion guns
- H01J49/16—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission
- H01J49/161—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission using photoionisation, e.g. by laser
- H01J49/162—Direct photo-ionisation, e.g. single photon or multi-photon ionisation
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Optics & Photonics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
nullThe invention discloses a kind of efficient combined-type atmospheric pressure ionization source，VUV lamp、High-field electrode、Ground electrode and quartz glass be arranged in parallel，And it is coaxial，Described quartz glass is between high-field electrode and ground electrode，Described injection port and mass spectrum injection port are separately positioned on the two ends of ionization source cavity，Aperture is had on the ground electrode of VUV lamp side，Sample enters the ionized region of ionization source inside cavity through injection port，The Single-photon ionization utilizing VUV lamp realizes the ionization of sample，And carry out qualitative analysis by mass spectrum injection port entrance mass spectrum，The light sent by VUV lamp again by be irradiated to after the aperture on ground electrode and quartz glass away from high-field electrode surface produce photoelectron，Photoelectron is as seed electrons，Reduce the discharge voltage of dielectric barrier discharge，Realize gas under low-voltage punctures formation plasma，VUV lamp is closed after discharge stability.Present configuration is simple, it is easy to miniaturization, cheap, advantage the most accurately qualitative, quantitative.
Description
Technical field
The present invention relates to technical field of analytical instruments, particularly relate to a kind of efficient combined-type atmospheric pressure ionization source.
Background technology
Mass-spectrometric technique can realize the accurate mass detection of compound and fragment ion thereof, it is achieved the standard to compound molecule
Definitiveness and quantitative analysis.It has the advantages such as highly sensitive, high flux, quantitative linearity are good.Have become as chemistry, medicine at present
Thing, material, biology, medical science, environment, the energy, food, criminal the detection means that multiple fields are conventional such as discern.
Mass spectrometer system generally includes ionization source, mass analyzer, ion transmission system, control system and vacuum system etc..
Wherein, the effect of ionization source is exactly to be gasified by determinand and ionize, and forms gas ion, arrives detector finally by analyzer
Detected.Conventional ionization source include Single-photon ionization (SPI) electron impact ionization source (EI), chemical ionization source (CI),
Electron spray ionisation source (ESI), atmosphere pressure chemical ion source (APCI), substance assistant laser desorpted ionized source (M ALDI
), inductively coupled plasma ionization source (ICPI).Wherein, ionization source based on Single-photon ionization is a kind of soft ionization source, it
Avoiding the generation of fragment ion, spectrogram is prone to resolve, and is particularly suitable for the electric analysis of variance of complex system, in recent years by more
Carry out the most concerns.But due to reasons such as optical window pollutions, in use signal attenuation is serious, causes quantitative analysis to be forbidden
Really.And atmosphere pressure chemical ion source of based on dielectric barrier discharge has the advantage of signal stabilization, play when quantitative analysis
Important function.But under atmospheric pressure, the breakdown voltage of electric discharge is the highest, needs bulky electric power system, is unfavorable for the micro-of instrument
Type and portable, is difficult to scene.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of efficient combined-type atmospheric pressure ionization source.
The present invention is achieved by the following technical solutions:
A kind of efficient combined-type atmospheric pressure ionization source, includes ionization source cavity, VUV lamp, high-field electrode, ground electrode, quartz glass
Glass, injection port, mass spectrum injection port, described VUV lamp, high-field electrode, ground electrode and quartz glass be arranged in parallel, and coaxially, institute
The quartz glass stated is between high-field electrode and ground electrode, and described injection port and mass spectrum injection port are separately positioned on ionization source
The two ends of cavity, have aperture on the ground electrode of VUV lamp side, and sample enters ionization source inside cavity through injection port
Ionized region, utilizes the Single-photon ionization of VUV lamp to realize the ionization of sample, and carries out qualitative point by mass spectrum injection port entrance mass spectrum
Analysis, then the light sent by VUV lamp pass through the aperture on ground electrode and quartz glass after be irradiated to away from high-field electrode surface
Producing photoelectron, photoelectron, as seed electrons, reduces the discharge voltage of dielectric barrier discharge, it is achieved under low-voltage, gas hits
Wear formation plasma, after discharge stability, close VUV lamp.
Described quartz glass can pass through vacuum-ultraviolet light.
The voltage of dielectric barrier discharge is between 100V to 10000V；Frequency is 10Hz-100MHz.
The invention have the advantage that VUV Single-photon ionization and Atmosphere Pressure Chemical Ionization (APCI) are combined by the present invention, it is possible to achieve wave
The organic qualitative and qualitative analysis of the property sent out；Utilize VUV light to irradiate surface of metal electrode generation photoelectron can significantly reduce greatly
The miniaturization of the breakdown voltage of pressure chemical ionization, beneficially electric power system and analytical tool and portable.Present configuration is simple,
It is prone to miniaturization, cheap, advantage the most accurately qualitative, quantitative.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
As it is shown in figure 1, a kind of efficient combined-type atmospheric pressure ionization source, include ionization source cavity 1, VUV lamp 2, high-tension electricity
Pole 3, ground electrode 4, quartz glass 5, injection port 6, mass spectrum injection port 7, described VUV lamp 2, high-field electrode 3, ground electrode 4 and stone
English glass 5 be arranged in parallel, and coaxially, described quartz glass 5 between high-field electrode and ground electrode, described injection port 6
With the two ends that mass spectrum injection port 7 is separately positioned on ionization source cavity 1, on the ground electrode 4 of VUV lamp 2 side, have aperture, sample
Product enter the ionized region 8 within ionization source cavity 1 through injection port 6, utilize the Single-photon ionization of VUV lamp 2 to realize the electricity of sample
From, and enter mass spectrum by mass spectrum injection port 7 and carry out qualitative analysis, then the light sent by VUV lamp 2 is by ground electrode 4
Be irradiated to after aperture and quartz glass 5 away from high-field electrode surface produce photoelectron, photoelectron as seed electrons, reduces and is situated between
The discharge voltage of matter barrier discharge, it is achieved under low-voltage gas puncture formation plasma, after discharge stability close VUV lamp.
Described quartz glass 5 can pass through vacuum-ultraviolet light.
The voltage of dielectric barrier discharge is between 100V to 10000V；Frequency is 10Hz-100MHz.
Photon energy is more than 8 eV.
The operation principle of the present invention is as follows:
When first carrying out wanting qualitative analysis, sample, in injection port 6 enters ionized region 8, utilizes the single photon that VUV lamp 2 is launched
Ionization realizes the ionization of sample, and enters mass spectrum by mass spectrum injection port 7 and be analyzed；Carry out quantitative analysis again, utilize VUV lamp
The photon irradiation electrode surface produced produces photoelectron, and these photoelectrons, as seed electrons, effectively reduce dielectric barrier discharge
Discharge voltage, it is achieved under low-voltage, gas punctures formation plasma；VUV lamp is closed after discharge stability；Sample is through entering
Sample mouth 6 enters in ionized region 8, utilizes metastable state molecule, atom that dielectric barrier discharge produces etc. to realize the quantitative analysis of sample.
Claims (3)
1. an efficient combined-type atmospheric pressure ionization source, it is characterised in that: include ionization source cavity, VUV lamp, high-field electrode,
Ground electrode, quartz glass, injection port, mass spectrum injection port, described VUV lamp, high-field electrode, ground electrode and quartz glass is parallel to be set
Put, and coaxially, described quartz glass is between high-field electrode and ground electrode, and described injection port and mass spectrum injection port are respectively
Being arranged on the two ends of ionization source cavity, have aperture on the ground electrode of VUV lamp side, sample enters ionization through injection port
The ionized region of source inside cavity, utilizes the Single-photon ionization of VUV lamp to realize the ionization of sample, and enters matter by mass spectrum injection port
Spectrum carries out qualitative analysis, then the light sent by VUV lamp pass through the aperture on ground electrode and quartz glass after be irradiated to away from
High-field electrode surface produces photoelectron, and photoelectron, as seed electrons, reduces the discharge voltage of dielectric barrier discharge, it is achieved low electricity
That depresses gas punctures formation plasma, closes VUV lamp after discharge stability.
A kind of efficient combined-type atmospheric pressure ionization source the most according to claim 1, it is characterised in that: described quartz glass
Vacuum-ultraviolet light can be passed through.
A kind of efficient combined-type atmospheric pressure ionization source the most according to claim 1, it is characterised in that: dielectric barrier discharge
Voltage is between 100V to 10000V；Frequency is 10Hz-100MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610855957.3A CN106206239B (en) | 2016-09-27 | 2016-09-27 | High-efficient combination formula atmospheric pressure ionization source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610855957.3A CN106206239B (en) | 2016-09-27 | 2016-09-27 | High-efficient combination formula atmospheric pressure ionization source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106206239A true CN106206239A (en) | 2016-12-07 |
| CN106206239B CN106206239B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610855957.3A Active CN106206239B (en) | 2016-09-27 | 2016-09-27 | High-efficient combination formula atmospheric pressure ionization source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037525A (en) * | 2017-11-29 | 2018-05-15 | 厦门大学 | A kind of device detected jointly for mass spectrum and optoelectronic speed imaging |
| CN109887831A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院大连化学物理研究所 | A method of slowing down the decaying of mass spectrum ionized region ion source |
| CN109887828A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院大连化学物理研究所 | A kind of combined type ionization source |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063673A (en) * | 2006-04-26 | 2007-10-31 | 中国科学院大连化学物理研究所 | Vacuumeultraviolet lamp ionization device in time-of-flight mass spectrometer |
| CN102479661A (en) * | 2010-11-30 | 2012-05-30 | 中国科学院大连化学物理研究所 | Composite ionization source for vacuum ultraviolet photoionization and chemical ionization for mass spectrometry |
| JP2013229454A (en) * | 2012-04-26 | 2013-11-07 | Hitachi High-Technologies Corp | Vuv processing unit and processing method having thickness monitor |
| CN104716010A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of quadrupole rod |
-
2016
- 2016-09-27 CN CN201610855957.3A patent/CN106206239B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063673A (en) * | 2006-04-26 | 2007-10-31 | 中国科学院大连化学物理研究所 | Vacuumeultraviolet lamp ionization device in time-of-flight mass spectrometer |
| CN102479661A (en) * | 2010-11-30 | 2012-05-30 | 中国科学院大连化学物理研究所 | Composite ionization source for vacuum ultraviolet photoionization and chemical ionization for mass spectrometry |
| JP2013229454A (en) * | 2012-04-26 | 2013-11-07 | Hitachi High-Technologies Corp | Vuv processing unit and processing method having thickness monitor |
| CN104716010A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of quadrupole rod |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037525A (en) * | 2017-11-29 | 2018-05-15 | 厦门大学 | A kind of device detected jointly for mass spectrum and optoelectronic speed imaging |
| CN109887831A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院大连化学物理研究所 | A method of slowing down the decaying of mass spectrum ionized region ion source |
| CN109887828A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院大连化学物理研究所 | A kind of combined type ionization source |
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| CN106206239B (en) | 2020-06-30 |
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